D.C. Mun. Regs. tit. 31, § 1301
1301.1 No person shall sell, install, repair, adjust, or calibrate taximeters or install or replace seals, wiring harnesses or other equipment relating to the operation of a taximeter or cruiser light for use upon any licensed taxicab in the District of Columbia without a valid taximeter business license issued by the Commission.
SOURCE: Final Rulemaking published at 55 DCR 3831 (April 11, 2008).